/* ========= INICIO FICHERO: css/style.css ========= */

/* ========= VARIABLES Y ESTILOS BASE ========= */
:root {
    --color-background: #0d1117; /* GitHub Dark Background */
    --color-surface: #161b22;   /* GitHub Dark Surface */
    --color-primary-text: #c9d1d9;
    --color-secondary-text: #8b949e;
    --color-accent: #00ffff; /* Cian/Azul eléctrico */
    --color-accent-hover: #00d9d9;
    --color-border: #30363d;
    --font-family: 'Inter', sans-serif;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-background);
    color: var(--color-primary-text);
    line-height: 1.6;
    font-size: 16px;
}

h1, h2, h3 {
    color: var(--color-primary-text);
    line-height: 1.2;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-accent-hover);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* ========= UTILIDADES Y CONTENEDOR ========= */
.container {
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 1.5rem;
}

.section {
    padding: 6rem 0;
}

.section__title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--color-primary-text);
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section__title::after {
    content: '';
    position: absolute;
    width: 60%;
    height: 3px;
    background-color: var(--color-accent);
    bottom: -10px;
    left: 20%;
}

/* ========= HEADER Y NAVEGACIÓN ========= */
.header {
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    background-color: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.nav {
    height: 4.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav__logo {
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: 1px;
}

.nav__list {
    display: flex;
    gap: 2rem;
}

.nav__link {
    color: var(--color-secondary-text);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav__link:hover {
    color: var(--color-accent);
}

/* ========= SECCIÓN HERO ========= */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    text-align: center;
    padding-top: 4.5rem; /* Altura del header */
}

.hero__container {
    max-width: 800px;
}

.hero__title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero__subtitle {
    font-size: 1.25rem;
    color: var(--color-secondary-text);
    margin-bottom: 2rem;
}

.hero__social {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.hero__social-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--color-border);
    border-radius: 8px;
    font-weight: 500;
    color: var(--color-primary-text);
    transition: background-color 0.3s, border-color 0.3s;
}

.hero__social-link:hover {
    background-color: var(--color-surface);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.hero__social-link i {
    font-size: 1.2rem;
}

/* ========= SECCIÓN PROYECTOS ========= */
.projects__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 2rem;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 255, 255, 0.1);
}

.project-card__title {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.project-card__description {
    color: var(--color-secondary-text);
    flex-grow: 1;
    margin-bottom: 1.5rem;
}

.project-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tag {
    background-color: rgba(0, 255, 255, 0.1);
    color: var(--color-accent);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.project-card__link {
    font-weight: 500;
    align-self: flex-start;
}

.project-card__link i {
    margin-left: 0.25rem;
    transition: transform 0.3s ease;
}

.project-card__link:hover i {
    transform: translateX(5px);
}

/* ========= SECCIÓN HABILIDADES ========= */
.skills__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.skill-group {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 2rem;
    border-radius: 8px;
}

.skill-group__title {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-primary-text);
}

.skill-group__title i {
    color: var(--color-accent);
}

.skill-group ul li {
    color: var(--color-secondary-text);
    padding: 0.5rem 0;
    position: relative;
    padding-left: 1.5rem;
}

.skill-group ul li::before {
    content: '›';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 700;
}

/* ========= SECCIÓN CONTACTO ========= */
.contact__container {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.contact__text {
    font-size: 1.1rem;
    color: var(--color-secondary-text);
    margin-bottom: 2rem;
}

.contact__form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form__group {
    position: relative;
}

.form__group input,
.form__group textarea {
    width: 100%;
    padding: 1rem;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-primary-text);
    font-family: inherit;
    font-size: 1rem;
}

.form__group input:focus,
.form__group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 2px rgba(0, 255, 255, 0.2);
}

.form__group label {
    position: absolute;
    top: 1rem;
    left: 1rem;
    color: var(--color-secondary-text);
    pointer-events: none;
    transition: all 0.3s ease;
}

.form__group input:focus + label,
.form__group input:not(:placeholder-shown) + label,
.form__group textarea:focus + label,
.form__group textarea:not(:placeholder-shown) + label {
    top: -0.75rem;
    left: 0.75rem;
    font-size: 0.8rem;
    padding: 0 0.25rem;
    background-color: var(--color-surface);
    color: var(--color-accent);
}

.button {
    background-color: var(--color-accent);
    color: var(--color-background);
    padding: 1rem 2rem;
    border: none;
    border-radius: 8px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
    align-self: center;
}

.button:hover {
    background-color: var(--color-accent-hover);
}

.form-status {
    margin-top: 1.5rem;
    font-weight: 500;
}
.form-status.success { color: #28a745; }
.form-status.error { color: #dc3545; }


/* ========= FOOTER ========= */
.footer {
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
    color: var(--color-secondary-text);
    font-size: 0.9rem;
}

/* ========= RESPONSIVE DESIGN ========= */
@media (max-width: 768px) {
    body {
        font-size: 15px;
    }

    .section {
        padding: 4rem 0;
    }

    .section__title {
        font-size: 2rem;
    }

    .nav {
        height: 4rem;
    }

    .nav__menu {
        /* Aquí se podría implementar un menú hamburguesa en el futuro */
        /* Por ahora, reducimos el espaciado para que quepa en pantallas pequeñas */
        position: fixed;
        bottom: 1rem;
        left: 50%;
        transform: translateX(-50%);
        background-color: var(--color-surface);
        padding: 0.5rem 1rem;
        border-radius: 2rem;
        border: 1px solid var(--color-border);
    }
    
    .nav__list {
        gap: 1rem;
    }

    .nav__link {
        font-size: 0.9rem;
    }

    main {
        padding-bottom: 5rem; /* Espacio para la nav flotante */
    }

    .hero {
        min-height: auto;
        padding: 8rem 0 4rem 0;
    }

    .hero__title {
        font-size: 2.5rem;
    }

    .hero__subtitle {
        font-size: 1.1rem;
    }
}

/* ========= FIN FICHERO: css/style.css ========= */